Im 99% sure
tan^-1 (6.2/22)= 15.7º
with 2 significant figures 16º
A liquid becomes a solid when energy is removed. The energy content decreases, and the speed of the particles decrease.
This is weird.
All three 'choices' are true.
Line um up. (a) shows how to solve the problem. (b) does it. and (c) is the answer.
Your answer would be total number of atoms! This is because when you have these equations which require total number of atoms.